64,815 research outputs found
Parameter Sensitivity Analysis of Social Spider Algorithm
Social Spider Algorithm (SSA) is a recently proposed general-purpose
real-parameter metaheuristic designed to solve global numerical optimization
problems. This work systematically benchmarks SSA on a suite of 11 functions
with different control parameters. We conduct parameter sensitivity analysis of
SSA using advanced non-parametric statistical tests to generate statistically
significant conclusion on the best performing parameter settings. The
conclusion can be adopted in future work to reduce the effort in parameter
tuning. In addition, we perform a success rate test to reveal the impact of the
control parameters on the convergence speed of the algorithm
Base Station Switching Problem for Green Cellular Networks with Social Spider Algorithm
With the recent explosion in mobile data, the energy consumption and carbon
footprint of the mobile communications industry is rapidly increasing. It is
critical to develop more energy-efficient systems in order to reduce the
potential harmful effects to the environment. One potential strategy is to
switch off some of the under-utilized base stations during off-peak hours. In
this paper, we propose a binary Social Spider Algorithm to give guidelines for
selecting base stations to switch off. In our implementation, we use a penalty
function to formulate the problem and manage to bypass the large number of
constraints in the original optimization problem. We adopt several randomly
generated cellular networks for simulation and the results indicate that our
algorithm can generate superior performance
Carrier Concentration Dependencies of Magnetization & Transport in Ga1-xMnxAs1-yTey
We have investigated the transport and magnetization characteristics of
Ga1-xMnxAs intentionally compensated with shallow Te donors. Using ion
implantation followed by pulsed-laser melting, we vary the Te compensation and
drive the system through a metal-insulator transition (MIT). This MIT is
associated with enhanced low-temperature magnetization and an evolution from
concave to convex temperature-dependent magnetization.Comment: 2 pages, 2 figures. To appear in the proceedings of the 27th
International Conference on the Physics of Semiconductors (ICPS-27,
Flagstaff, AZ, July 26-30, 2004
Quantum adaptation of noisy channels
Probabilistic quantum filtering is proposed to properly adapt sequential
independent quantum channels in order to stop sudden death of entanglement. In
the adaptation, the quantum filtering does not distill or purify more
entanglement, it rather properly prepares entangled state to the subsequent
quantum channel. For example, the quantum adaptation probabilistically
eliminates the sudden death of entanglement of two-qubit entangled state with
isotropic noise injected into separate amplitude damping channels. The result
has a direct application in quantum key distribution through noisy channels.Comment: 6 pages, 4 figure
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